Patent US1751928A successfully refreshed from Google Patents.
Patent US3846045A successfully refreshed from Google Patents.
US3846045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump impellers for cooling systems of i.c.e.
Assignee: Societe Internationale de Mecanique Industrielle SA
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Filing: 1973-04-09
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Granted: 1974-11-05
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Expires: 1993-04-09
Abstract
Abstract This composite impeller is intended for use in a pump incorporated in the cooling system of an internal combustion engine and comprises a metal hub permitting the tight fitting of the impeller on the pump shaft, and an impeller proper having one outer peripheral portion of said hub embedded therein, said impeller consisting of a mixture of thermosetting resin having a low coefficient of water absorption when heated and of a waterrepellent filler not liable of undergoing appreciable changes in its dimensions in the presence of water; this composite impeller is capable of operating satisfactorily in engines having rotational speeds of up to 9,000 r.p.m. under temperatures of the order of 130*C.
Inventors
- 👤 A Mincuzzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:04
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2222; F04D29/2227; F04D29/02; F04D29/026; F04D29/20; F05; F05D; F05D2300/00; F05D2300/40; F05D2300/43; F05D2300/60; F05D2300/603; F05D2300/615
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
Pump impeller for cooling systems of internal combustion engines, comprising a metal hub adapted to be force fitted to an engine shaft and having an outflaring portion at its outer end, a sleeve molded from thermosetting resin having a low hot-water absorption coefficient and a thickness increasing from its inner face to its outer face anchored to the outflaring hub portion, a rubber ring fitted into the rear face of said sleeve, a packing ring securing said rubber ring to the rear face of said sleeve, and impeller blades having their outer edges inscribed in a cylinder concentric to the impeller axis and formed integrally with said sleeve.
Claim 2
Dependent Claim
108 words
Pump impeller for cooling systems of internal combustion engines, comprising a metal hub adapted to be force fitted to an engine shaft and having an outflaring portion at its outer end, a sleeve molded from thermosetting resin having a low hot-water absorption coefficient and a thickness increasing from its inner face to its outer face anchored to the outflaring hub portion, a rubber ring fitted into the rear face of said sleeve, a packing ring securing said rubber ring to the rear face of said sleeve, and impeller blades having their outer edges inscribed in a cylinder concentric to the impeller axis and formed integrally with said sleeve.
Claim 3
Dependent Claim
25 words
Pump impeller as claimed in claim 1, wherein said sleeve is hollowed out on each side of its portion anchored to the hub outflaring portion.
Claim 4
Dependent Claim
31 words
Pump impeller as claimed in claim 1, wherein said hub is formed with a U-sectioned radial outflaring portion of which the free end is bent and embedded in the sleeve material.
Claim 5
Dependent Claim
20 words
Pump impeller as claimed in claim 1, wherein said molded sleeve comprises a formophenol resin containing an asbestos fiber filler.
Claim 6
Dependent Claim
28 words
Pump impeller as claimed in claim 1, wherein said molded sleeve comprises a formophenol resin containing a filler consisting of at least thirty percent of a suitable elastomer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |